<template>
  <div>
    <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row :gutter="20">
        <el-col :span="7">
          <el-input placeholder="请输入内容" clearable>
            <el-button icon="el-icon-search"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <el-button v-model="scope.row.id" @click="showEditRoleDialog(scope.row.id)" type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button @click="removeRoleById(scope.row.id)" type="danger" icon="el-icon-delete" size="mini">删除
            </el-button>
            <el-button @click="showSetRightDialog(scope.row)" type="warning" icon="el-icon-setting" size="mini">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog title="创建角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 角色数据列表
      roleList: [],
      // 控制添加角色对话框展示与否
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色的表单验证规则对象
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '角色名的长度在3到10个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            min: 5,
            max: 15,
            message: '描述的长度在5到15字以内',
            trigger: 'blur'
          }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '角色名的长度在3到10个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            min: 5,
            max: 15,
            message: '描述的长度在5到15字以内',
            trigger: 'blur'
          }
        ]
      },
      setRightDialogVisible: false,
      //权限列表
      rightsList: {},
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200)
        return this.$message.error('获取角色列表失败')
      this.roleList = res.data
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 提交添加角色请求
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201)
          return this.$message.error('创建角色失败！')
        this.$message.success('创建用户成功！')
        this.addDialogVisible = false
        this.getRoleList()
      })
    },
    // 展示编辑角色对话框
    async showEditRoleDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('查询角色信息失败！')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击编辑角色并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return

        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        if (res.meta.status !== 200)
          return this.$message.error('更新角色信息失败！')
        this.editDialogVisible = false
        this.getRoleList()
        this.$message.success('更新角色信息成功！')
      })
    },
    // 删除角色
    async removeRoleById(id) {
      var confirmRes = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
          center: true
        }
      ).catch(err => err)
      if (confirmRes !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('删除用户信息失败！')
      this.$message.success('删除用户信息成功！')
      this.getRoleList()
    },
    // 根据id删除对应权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmRes = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmRes !== 'confirm') return this.$message.info('取消了删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.$message.success('删除成功')

      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200)
        return this.$message.error('获取权限数据失败')
      this.rightsList = res.data

      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    //以递归形式获取所有三级节点的id数组
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const keysStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: keysStr
        }
      )
      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
      this.$message.success('分配权限成功！')
      this.getRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
